Asfordby moved up to second after a comfortable away win despite being shorn of all strikers and reduced to the bare XI.
Shirtcliffe proved a formidable replacement up front, tormenting the GNG defence on numerous occasions in the first half.
Exton was the first to threaten when he headed over, and soon after Thompson’s fine shot forced a save. But it was Shirtcliffe who opened the scoring when he leapt to head past the advancing keeper.
He then made it two, outsprinting the home defence before firing his shot into the corner.
The second half saw Asfordby ease off the accelerator and briefly lose the initiative which allowed GNG to capitalise and pull a goal back.
But the two-goal lead was soon restored when Knatt’s raking pass sent Fuller clear. He surged into the box before smashing home a thunderous shot.
Asfordby: S. Davies, D. Exton, M. Shirtcliffe, J. Partridge, J. Scatchard, W. Knatt, E. Harrison, E. Thompson, A. Brown, K. Doody, J. Fuller.